Compressor



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COMPRESSOR Filed Nov. 7, 1958 5 Sheets-Sheet 5 INVENT OR. fl4po4za i.Ina/vs Patented Oct. 31, 1961 3,906,533 COMPRESSOR Harold E. Adams,Norwalk, Conn., assignor to Nash Engineering Company, South Norwalk,Conn., a corporation of Connecticut Filed Nov. 7, 1958, Ser. No. 772,56812 Claims. (Cl. 23G79) This invention relates in general to pumps andparticularly to a new and useful hydroturbine or a liquid ring type pumpfor creating suction pressures for a plurality of suction servicerequirements.

The present invention is similar to that disclosed and claimed in PatentNo. 2,672,276, granted March 16, 1954, to the present inventor. Thepresent invention is an improvement over the aforementioned patentparticularly in respect to the improved head construction permittingmultiple inlet and multiple outlet connections servicing each end of adouble rotor impeller.

The present invention relates to the provision of four separate,independently acting pumps formed in a single housing and with a singlerotor. The pump housing includes an interior wall defining a pumpingchamber in which a main divided blade rotor is rotated. The constructionforms two separate pumping chambers at each end of the pump. Each of thelobes of the pumping chambers are independently operable and may beindependently connected to a separate suction service. That is, eachlobe may be separately applied to a service requiring separate vacuumconditions, for example, a suction box of a paper making machinerequiring ten inches of mercury pressure and a suction roll requiringfifteen or twenty inches of mercury pressure absolute. The presentinvention includes a central ported member at each end of the pump andhousin members or heads which in conjunction define individualizedpassageways for four separate inlets and discharge connections. Theinvention includes refinements in the pump construction permitting theisolation of the pump into the four separate inlet and dischargeportions by the complete isolation of the individual lobes of the pumpby improved liquid sealing means.

In liquid ring type pumps, 2. liquid ring is formed by the rotation ofthe rotor and serves as a pumping medium. The liquid is caused to recedefrom and return to the center of rotation alternately, first to draw gasthrough an intake port and then to force it out through a dischargeport.

In pumps of this nature it was usual to provide only single inlet pipeconnections and single discharge pipe connections for the completeoperating pump. In Patent No. 2,672,276, applicant presented a pump ofthis character which was of double rotor construction and provided withmeans at each end of the pump for a separate inlet and outlet for arespective end of the rotor. It was possible by means of the inventiondisclosed by this patent to operate two separate suction services from asingle pump,

Pumps of this type could operate only with a separate suction anddischarge at each end of the pump and thus were capable of servicingonly two suction service requirements. In accordance with the presentinvention there is provided a separate inlet for each inlet port of eachend of the pump, thus providing means for connecting separate servicelines at four locations. With improvements made in the sealing andseparation of the passageways of the present pump construction, it hasbeen possible to divorce each of the two operating loads on each side ofthe double rotor so that the two inlet ports associated therewith may beapplied to independent services requiring various ranges of suctionconditions.

Accordingly, it is an object of this invention to provide a pump havingmultiple inlets for connections to indi- Vidual suction applicationscorresponding to the number of liquid displacement portions within thepump.

A further object of the invention is to provide an improved hydroturbinetype suction pump construction including a double inlet head at each endof the pump.

A further object of the invention is to provide an improved hydroturbinesuction pump including at least three inlets for three separate serviceconnections.

A further object of the invention is to provide an improved liquid ringtype pump including a total of four inlets and four outlets capable ofconnection to individual service systems.

A further object of the invention is to provide a liquid ring type pumpof the character described which i simple in design, rugged inconstruction and economical to manufacture.

The various features of novelty which characterize the invention arepointed out with particularity in the claims annexed to and forming apart of this specification. For a better understanding of the invention,its operating advantages and specific objects attained by its use,reference should be had to the accompanying drawings and descriptivematter in which there is illustrated and described a preferredembodiment of the invention.

In the drawings:

FIG. 1 is a side elevation of a pump constructed in accordance with theinvention;

FIG. 2 is an end elevation of the pump shown in FIG. 1; 1

FIG, 3 is a vertical section taken on the line 33 FIGS. 1 and FIG. 4 isa vertical section taken on the line 44 of FIGS. 1 and 5;

FIG. 5 is a transverse vertical section taken on the line 55 of FIGS. 2,3 and 4;

FIG. 6 is a view similar to FIG. 3 but indicating an alternateembodiment of head construction;

FIG. 7 is a fragmentary, enlarged transverse section taken on the line77 of FIG. 2; and

FIG. 8 is a fragmentary, enlarged section similar to FIG. 5, but showingthe improved liquid ring sealing construction in accordance with theinvention.

Referring to the drawings in particular the invention as embodiedtherein includes a central cylindrical rotor housing 10 covered at eachend by two end casing mani folds or heads 12 and 14, respectively. Theheads 12 and 14 are mounted on a set of longitudinally extending,laterally spaced feet or legs 16 and 18 which support the pump abovefloor level..

The central portion of each of the heads 12 and 14 is machined toreceive a set of bearings 19, 19 for a rotor shaft 20 which carries adouble rotor generally designated 22. The rotor 22 rotates within thecylindrical housing It the interior of which is machined to define a setof opposite lobes 24 and 26 and intervening lands 28 and 30.

The double rotor 22 comprises a hub portion 23 which is keyed to the.shaft 20 for rotation therewith. Extending radially outwardly from thehub portion are a plurality of equally spaced identical blades or vaneswhich are connected to one another through end shrouds 27 and 29, and acentral partition 23. The partition 32is aligned with and is closelyadjacent an inwardly directed annular partition flange 34 formed in thehousing 10. The partition flange 34 cooperates with the rotor partition32 to divide the working pumping space into right-hand and left-handpumping chambers (FIG. 5).

The inner boundary of the rotor is double conical in form, being adaptedtomaintain fine clearances with ported cones 36 and 38. Each cone 36 and38 includes two diametrically opposed inlet ports 40 and 42 (see FIG. 4)and two diametrically opposed outlet ports 44 enl gordar ce with theinvention the heads 12 and 14 fi m/W [WI/ill?! W171i!!! fll WV 17110 W;m; aw am this ch WWW/Mi WWW W W Wit/(WWWWW WWW 9mm wmwwawwmm I) w/Jwhgwaw m/w 1/4 11 H 7 110 g/ymf/m fl aiiazzy a// 43 Jog/z W 0m f the air infree sage 84 connected to the outlet passage 76 and a lower oppositelyextending lateral discharge conduit 86 connected to the dischargepassage 78.

With the embodiment illustrated in FIG. 6 it is possible to have manyvariations of service connections. In this embodiment it is possible toseparate the discharge passages as Well as the inlet passages in thoseinstances where it would be desirable.

Thus, the invention provides in a single pump construction a suctiondevice which may be utilized for up to four different serviceconnections each of which are to be operated over different pressureranges.

While a specific embodiment of the invention has been shown anddescribed in detail to illustrate the application of the inventionprinciples, it will be understood that the invention may be embodiedotherwise without departing from such principles.

What is claimed is:

l. A gas pump of the liquid ring type comprising in combination a bodyincluding at least two lobes, a rotor operative therein, the body androtor including partition members for dividing the working space intotwo pumping chambers each including at least two independently operablelobe portions each capable of being applied to a separate pumpingservice, separate ported members defining the inner boundaries of therespective pumping chambers and including passages to transmit gas toand from the respective chambers and defining at least one independentlyoperable inlet for each lobe portion of each chamber and at least oneoutlet for each pumping chamber, and heads closing the outer ends of therespective chambers and having passages therein constructed and arrangedto transmit gas to and from the said ported members, each head beingprovided with a separate head inlet connecting each pumping chamberinlet and an outlet connecting each pumping chamber outlet whereby eachchamber can be independently applied to at least two separate pumpingservices.

2. A gas pump of the liquid ring type comprising in combination a lobedbody defining at least two lobe portions, a rotor operative therein, thebody and rotor including partition members for dividing the workingspace into two pumping chambers each with two lobe portions, separateported members defining the inner boundaries of the respective pumpingchambers and including passages to transmit gas to and from therespective chambers, and heads closing the outer ends of the respectivechambers and having passages therein constructed and arranged totransmit gas to and from said ported members, each head being providedwith at least two separate inlets and an outlet whereby each chamber canbe applied to at least two separate pumping services, means connectingsaid heads for suppling liquid seal to said inlets, said rotor havingend shrouds spaced from said head and defining a sealing chambertherebetween, and passage means communicating with said sealing chamberand said inlets to continuously withdraw air therefrom and maintain saidchamber full of liquid.

3. A gas pump of the liquid ring type comprising in combination a lobedbody defining at least two lobe portions, a rotor operative therein, thebody and rotor including partition members for dividing the workingspace into two pumping chambers each with two lobe portions, separateported cone members defining the inner boundaries of the respectivepumping chambers and including at least two inlet ports and a dischargeport connected to each of said chambers, and heads closing the outerends of the respective chambers and having passages therein connectingsaid ported cone members and arranged to transmit gas to and from therespective ported cone members, each head having a separate inlet incommunication with each of said ported cone inlet ports whereby eachchamber can be applied to two separate pumping services if desired.

4. A gas pump according to claim 3, wherein said heads are provided withconnection means for supplying sealing liquid for the operation of saidpump, communicating with the inlet passages of said pump, said rotorhaving end shrouds defining a sealing chamber space between said headsand said end shrouds and passage means communicating with said inletsand said sealing chamber.

5. A gas pump of the liquid ring type comprising a lobed body definingat least two lobe portions, a vaned rotor rotating within said body,said body and said rotor including partition members for dividing thepumping space into two pumping chambers each with two lobe portions,each pumping chamber having wall means communicating therewith having aplurality of ported inlets and separate first passages in communicationwith each of said inlets, heads enclosing the outer ends of therespective chambers and having a plurality of second passages therein,each one in alignment with associated ones of said first passages andwith respective ported inlets whereby to form a separate inlet for eachof said plurality of ported inlets, and a discharge passage defined insaid heads.

6. A gas pump of the liquid ring type comprising in combination ahousing including an interior formed with two opposite lobed portionsconnected by land portions, a rotor having substantially identical vanesrotatable within said housing, means for dividing the interior of saidhousing into two pumping chambers at each end thereof each including atleast two independently operable lobe portions, central ported membersdefining at least two separate inlet passages, each connecting arespective lobed portion of said housing, and casing wall means at eachend of said housing defining an outlet connecting each of said pumpingchambers to the exterior of said housing and an inlet connecting each ofsaid inlet passages.

7. A pump according to claim 5, wherein said casing wall means includesa head having partition means dividing it into at least two inletpassages and a discharge passage.

8. A pump according to claim 6, wherein said discharge passage includesat least two discharge conduits connected thereto.

9. A pump according to claim 5, including partition means dividing saidhead into at least two inlet passages and at least two dischargepassages and separate conduit means connecting each of said passages.

10. A gas pump of the liquid ring type comprising in combination ahousing including an interior formed with two opposite lobed portionsconnected by land portions, a rotor having substantially identical vaneswith the shroud members at each end thereof rotatable within saidhousing, means for dividing the interior of said housing into twopumping chambers at each end thereof, end head members closing each endof said pump including a walled portion spaced from said rotor shroudmembers and forming a sealing chamber therebetween and including atleast one separate interior inlet passages each capable of being appliedto a separate pumping service separately connecting each respectivelobed portion of each of said pumping chambers and separate interiordischarge passages connecting each of said pumping chambers, passagemeans defining a liquid inlet connecting said inlet passages, and meansconnecting said sealing chamber to said liquid inlet passage means.

11. A gas pump of the liquid ring type comprising a housing having aninterior pumping chamber including at least two lobe portions, a rotoroperative in said pumping chamber, a ported member defining the innerboundary of said pumping chamber and including at least oneindependently operable inlet for each lobe portion and at least oneoutlet for said pumping chamber, a head means closing the ends of saidpumping chamber having a separate inlet passage defined thereinconnecting each lobe inlet, and an outlet passage defined thereinconnecting said outlet.

12. A gas pump according to claim 11, including means connecting saidhead for suppling liquid seal to said inlets, said rotor having an endshroud spaced from said head and defining a sealing chambertherebetween, and passage means communicating with said sealing chamberand said inlets to continuously withdraw air therefrom and maintain saidchamber full of liquid.

References Cited in the file of this patent UNITED STATES PATENTS

